JP2013112315A - Seat device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To propose a seat device which can enhance the reliability of a seating detection.SOLUTION: The seat device includes a cushion pad 8 and a seating sensor. The cushion pad 8 has a base 65 provided by insert molding to at least part of a lower face of the cushion pad 8. Meantime, the seating sensor has at least one pressure sensitive switch SW1 for detecting a load applied to a seat face of the cushion pad 8 and is directly or indirectly fixed to the base 65 provided in the cushion pad 8.

Description

  The present invention relates to a seat device such as a vehicle, and is suitable in the technical field of detecting seating.

  As one of safety systems in vehicles, an alarm system for warning that a seat belt is not worn when riding is put into practical use. In this alarm system, a warning is issued when seat belt wearing is not detected in the state where seating of a person is detected. As a seat device used for such an alarm system, the following Patent Document 1 has been proposed.

  The seat device of Patent Document 1 includes a cushion pad made of foaming resin and a seating sensor that detects the seating of a person, and the seating sensor is integrally molded inside the cushion pad.

International Publication No. 2004/107919

  However, since the seating sensor of Patent Document 1 is integrated inside the cushion pad, even when the seating device is not seated, the pressure-sensitive switch of the seating sensor tends to be crushed and turned on. In this case, the reliability of seating detection in the seat device is poor.

  As one method for preventing the pressure sensitive switch from being crushed even when not sitting on the seat device in this way, it is conceivable to attach a seating sensor to the lower surface of the cushion pad.

  However, generally, a release agent such as oil or fat is applied to the inner surface of a mold for foaming a cushion pad, and the release agent remains on the surface of the cushion pad after foam molding. It was found that it was difficult to bond. In addition, depending on the type of adhesive or the like, there is a possibility that the cushioning property of the cushion pad may be changed. If such a change occurs, the reliability as a seat device is poor.

  Then, an object of this invention is to provide the seat apparatus which can improve reliability, and its manufacturing method.

  In order to solve this problem, the present invention is a seat device including a cushion pad and a seating sensor, wherein the cushion pad has a base material provided by insert molding on at least a part of the lower surface of the cushion pad. The seating sensor has at least one pressure-sensitive switch for detecting a load applied to the seating surface of the cushion pad, and is fixed directly or indirectly to the base material.

  According to such a seat device, the seating sensor is disposed on at least a part of the lower surface of the cushion pad. For this reason, it can suppress that the pressure-sensitive switch of a seating sensor turns on also when not seating compared with the case where a seating sensor is shape | molded integrally in the inside of a cushion pad. Further, since the base material is provided on at least a part of the lower surface of the cushion pad by insert molding, the base material is firmly fixed to the cushion pad, and the seating sensor is fixed to the base material. Therefore, the fixed state can be strongly maintained as compared with the case of directly fixing to the surface of the cushion pad. Further, it is possible to avoid the possibility of changing the cushioning property of the cushion pad. Thus, without impairing the cushioning property of the cushion pad, it is possible to suppress the pressure-sensitive switch of the seating sensor from being turned on even when not sitting, and the reliability of the seat device can be improved.

  In addition, a recess is formed in a lower surface of the cushion pad at a position including an upper portion of the pressure sensitive switch, and the seating sensor is disposed below the bottom of the concave portion, and the concave portion is located above the pressure sensitive switch. It is preferable that a gap is formed between the bottom portion of the cushion pad and the seating sensor, and the base material is provided on at least a part of the lower surface of the cushion pad other than the bottom portion of the concave portion above the pressure-sensitive switch. .

  In such a seat device, a gap is formed between the seating sensor disposed below the bottom of the recess formed on the lower surface of the cushion pad and the bottom portion of the recess above the pressure-sensitive switch in the seating sensor. Is done. For this reason, compared with the case where the gap is not formed, it is possible to reduce the fact that the pressure sensitive switch is turned on by a load applied to the cushion pad when a load lighter than a person is placed. . In addition, the sensitivity of the pressure sensitive switch can be adjusted depending on the size of the gap. As described above, the erroneous detection can be structurally reduced without depending on the fact that the erroneous detection is electrically determined. On the other hand, in this seat device, a base material is provided on at least a part of the lower surface of the cushion pad other than the bottom part of the concave portion above the pressure sensitive switch, and the seating sensor is directly or indirectly fixed to the base material. . For this reason, a base material functions as a stopper which prevents that a seating sensor moves above a cushion pad. Therefore, for example, even when the cushion pad moves up and down due to vibration or the like, it is possible to prevent the seating sensor and the cushion pad from contacting each other due to the vertical movement and the pressure sensitive switch from being turned on. Can do.

  The pressure-sensitive switch has a first insulating sheet, a second insulating sheet that is flexible and is disposed closer to the seating surface side of the cushion pad than the first insulating sheet, and the first insulating sheet. And a sheet-like spacer interposed between the second insulating sheets and having at least one opening formed thereon, and disposed on the spacer side surface of the first insulating sheet and the second insulating sheet, respectively. It is preferable to include a pair of electrodes facing each other with a gap therebetween.

  In such a seat device, when a load is applied to the cushion pad, the cushion pad is deformed and presses the second insulating sheet disposed on the seat surface side of the cushion pad. Since the second insulating sheet has flexibility, it bends so as to enter the opening of the spacer interposed between the second insulating sheet and the first insulating sheet in response to the pressing of the cushion pad. By bending in this way, a pair of electrodes opposed to each other through the opening are electrically connected and become conductive, and the pressure sensitive switch is turned on.

  In addition, at least a part of a surface of the spacer facing the second insulating sheet is exposed from the second insulating sheet, and the exposed portion is attached to the base material with an adhesive, whereby the base material is It is preferably fixed directly or indirectly.

  According to such a seat device, even if the bonding between the second insulating sheet and the spacer is omitted, the second insulating sheet and the spacer can be arranged at a fixed position, so that the cost of the adhesive can be suppressed. .

  The seating sensor further includes a cushion member that is provided on a surface of the second insulating sheet opposite to the spacer side and covers at least a part of the opening through the second insulating sheet. It is preferable that there is a gap between the cushion member and the cushion pad.

  In general, since the hardness of the cushion pad varies depending on the type of vehicle, etc., the degree of elastic deformation of the cushion pad varies depending on the type of the cushion pad depending on the person sitting. In this seat device, since there is a cushion member that covers at least a part of the pressure sensitive switch on the seating surface side of the cushion pad, the cushion member is similarly deformed regardless of the hardness of the cushion pad, and the pressure sensitive switch Can be pressed. Therefore, even if there is a gap between the cushion member and the cushion pad, the pressure sensitive switch can be appropriately turned on.

  Moreover, it is preferable that a reinforcing member is provided on at least a part of the surface of the first insulating sheet opposite to the surface facing the spacer.

  Even if the space below the first insulating sheet is a space, the durability of the seating sensor itself can be improved.

  Moreover, it is preferable that the first insulating sheet is harder than the second insulating sheet.

  According to such a seat device, when the second insulating sheet bends, the first insulating sheet has a smaller amount of bending than the second insulating sheet, and therefore the position of the electrode disposed on the first insulating sheet is approximately. Retained. For this reason, compared with the case where the flexible 1st insulating sheet is employ | adopted, even if the pressing force from a seat surface side is small, it arrange | positions at the electrode and 2nd insulating sheet which are arrange | positioned at a 1st insulating sheet. It becomes easy to contact an electrode. Therefore, the sensitivity of the pressure sensitive switch itself can be further improved.

  Moreover, the manufacturing method of the seat apparatus in this invention is the base material arrangement | positioning process which arrange | positions a base material in the surface site | part used as the lower surface of a cushion pad among the surfaces of the molding space in a metal mold | die, A mold release agent applying step for applying a release agent to the surface of the molding space, a molding step for injecting a foamed resin into the molding space to mold the cushion pad, and the cushion pad after the molding step. A sensor fixing step for directly or indirectly fixing a seating sensor having at least one pressure-sensitive switch for detecting a load applied to the seating surface of the cushion pad to the base material exposed from the lower surface of the cushion pad; It is characterized by providing.

  In such a method for manufacturing a seat device, the base material can be insert-molded on at least a part of the lower surface of the cushion pad in a state where a part of the surface of the cushion pad is exposed as the surface of the base material. A cushion pad in which the material is firmly fixed can be manufactured. Moreover, the cushion pad which has a part (base material part) to which a mold release agent is not apply | coated can be manufactured. Therefore, the fixed state can be strongly maintained as compared with the case where the seating sensor fixed to the base material is directly fixed to the surface of the cushion pad. Further, it is possible to avoid the possibility of changing the cushioning property of the cushion pad. In this manufacturing method, the seating sensor is arranged on at least a part of the lower surface of the cushion pad. For this reason, it can suppress that the pressure-sensitive switch of a seating sensor turns on also when not seating compared with the case where a seating sensor is shape | molded integrally in the inside of a cushion pad. Thus, without impairing the cushioning property of the cushion pad, it is possible to suppress the pressure-sensitive switch of the seating sensor from being turned on even when not sitting, and the reliability of the seat device can be improved.

  As described above, according to the present invention, a seat device capable of improving reliability can be provided.

It is a perspective view which shows the seat apparatus of 1st Embodiment. It is a perspective view which shows the structure of a seating sensor. It is a figure which shows a mode that the seating sensor was seen from the upper side, and the mode of the cross section of a seating sensor. It is a figure which shows the equivalent circuit of a seating sensor. It is a figure which shows the mode that the seat apparatus was seen from the upper side, and the mode of the cross section of a seat apparatus. It is a conceptual diagram which shows distribution of the load given to the base by which the seat part of a cushion pad is mounted from the person who seats normally on a cushion pad in three steps. It is a figure which shows a mode that a pressure sensitive switch turns on from the same viewpoint as (B) of FIG. It is a flowchart which shows the manufacturing method of a seat apparatus. It is a figure which shows the mode after a base material arrangement | positioning process and a mold release agent application | coating process. It is a figure which shows the mode after a formation process. It is a figure which shows the seat apparatus of 2nd Embodiment from the viewpoint similar to (B) of FIG. It is a figure which shows the seat apparatus of 3rd Embodiment from the viewpoint similar to (B) of FIG. It is a figure which shows the seat apparatus of 4th Embodiment from the viewpoint similar to (B) of FIG. It is the schematic where it uses for description of the relationship between the opening of a spacer, and a cushion pad.

  Hereinafter, a preferred embodiment of a seat device according to the present invention will be described in detail with reference to the drawings.

(First embodiment)
FIG. 1 is a perspective view showing a seat device 1 according to the first embodiment. As shown in FIG. 1, the seat device 1 of the present embodiment includes a seating sensor 7 and a cushion pad 8 as main components.

  FIG. 2 is a perspective view showing the structure of the seating sensor 7. The seating sensor 7 includes a first electrode sheet 10, a second electrode sheet 20, a spacer 30, and a cushion member 40 as main components.

  The first electrode sheet 10 includes a first insulating sheet 11, a plurality of first electrodes 12A to 12D, and a pair of terminals 13A and 13B. The first insulating sheet 11 has a flexible film shape and is connected to a substantially rectangular main block B1 and one end of the main block B1 in the short direction, and is a substantially rectangular sub-block smaller than the main block B1. B2. Examples of the material of the first insulating sheet 11 include resins such as PET, PBT, and PEN.

  The first electrodes 12 </ b> A to 12 </ b> D each have a substantially circular shape and are arranged on one surface of the first insulating sheet 11 in a state of being aligned in the same straight line. Each of the pair of terminals 13A and 13B has a substantially rectangular shape, and is disposed on the same surface as the surface on which the first electrodes 12A to 12D are disposed in the sub-block B2.

  The first electrode 12A and the first electrode 12B are electrically connected by the first wiring 14A, and the first electrode 12C and the first electrode 12D are electrically connected by the first wiring 14B. The first wiring 14A and the terminal 13A are electrically connected by the first wiring 14C, and the first wiring 14B and the terminal 13B are electrically connected by the first wiring 14D.

  The second electrode sheet 20 includes a second insulating sheet 21 and second electrodes 22A to 22D. The second insulating sheet 21 has a flexible film shape and has the same shape and size as the main block B <b> 1 in the first insulating sheet 11. Examples of the material of the second insulating sheet 21 include resins such as PET, PBT, and PEN.

  The second electrodes 22 </ b> A to 22 </ b> D each have a substantially circular shape and are arranged on one surface of the second insulating sheet 21 in a state of being aligned in the same straight line. In the present embodiment, the size of the second electrodes 22A to 22D is the same as that of the first electrodes 12A to 12D, and the arrangement positions of the second electrodes 22A to 22D are the positions of the first electrodes 12A to 12D with respect to the main block B1. It is relatively the same as the arrangement position.

  The second electrode 22A and the second electrode 22B are electrically connected by the second wiring 24A, and the first electrode 22C and the second electrode 22D are electrically connected by the second wiring 24B. The second wiring 24A and the second wiring 24B are electrically connected by the second wiring 24C.

  The spacer 30 has the same shape and size as the main block B1 in the first insulating sheet 11, and has a plurality of openings 31A to 31D. Examples of the material of the spacer 30 include resins such as PET, PBT, and PEN. These openings 31A to 31D have a substantially circular periphery, and the diameters of the openings 31A to 31D are slightly smaller than the diameters of the first electrodes 12A to 12D. In addition, the arrangement positions of the openings 31A to 31D are relatively the same as the arrangement positions of the first electrodes 12A to 12D with respect to the main block B1.

  In each of the openings 31A to 31D, slits 32A to 32D that are spatially connected to the outside of the spacer 30 are formed. That is, one end of each of the slits 32 </ b> A to 32 </ b> D is connected to the corresponding opening 31 </ b> A to 31 </ b> D, and the other end is opened to the side of the spacer 30.

  The cushion member 40 is an elastic member that deforms so as to be crushed when pressure is applied, and is formed of, for example, a sponge-like resin provided with a large number of pores, a nonwoven fabric in which resin fibers are intertwined, rubber, or the like. . The cushion member 40 in the present embodiment has a substantially rectangular parallelepiped shape, and its wide surface is smaller than the wide surface of the second insulating sheet 21.

  FIG. 3 is a diagram illustrating a state of the seating sensor 7 as viewed from above and a cross-sectional state of the seating sensor 7. Specifically, FIG. 3A is a view showing the seating sensor 7 as viewed from above, and FIG. 3B is a cross-sectional view taken along line VV in FIG. It is a figure which shows a mode.

  As shown in FIG. 3B, the first electrode sheet 10 is affixed to one surface of the spacer 30 and the second electrode sheet 20 is affixed to the other surface of the spacer 30 to form one structure. SSB (hereinafter referred to as sheet structure).

  In this sheet structure SSB, a part of a pair of insulating sheets 11 and 21, a spacer 30 interposed between these sheet portions, and a pair of electrodes 12 A and 22 A facing each other through an opening 31 A provided in the spacer 30. A pressure sensitive switch SW1 is configured. In the present embodiment, the pair of electrodes 12A and 22A are opposed to each other with a predetermined distance while being accommodated in the opening 31A.

  In the sheet structure SSB, the pressure sensitive switches SW2 to SW4 shown in FIG. 3A are configured in the same manner as the pressure sensitive switch SW1. In this embodiment, the insulating sheets and spacers that are constituent elements of each of the pressure sensitive switches SW1 to SW4 are a part of one insulating sheet 11, 21 and spacer 30, but they may be separate from each other. good.

  Further, in the second insulating sheet 21 of the sheet structure SSB, the cushion member 40 that covers the openings 31A to 31D via the second insulating sheet 21 is provided in a substantially central region of the surface opposite to the surface facing the spacer 30. Is pasted. In addition, the area | region which is not covered with the cushion member 40 among the one surfaces of this 2nd insulating sheet 21 is the peripheral area | region AR of the 2nd insulating sheet 21. FIG.

  Thus, the seating sensor 7 has a structure in which the first electrode sheet 10, the spacer 30, the second electrode sheet 20, and the cushion member 40 are integrally laminated in this order.

  The seat device 1 according to the present embodiment includes a reinforcing tape 50 that improves the durability of the seating sensor 7. The reinforcing tape 50 is, for example, an adhesive tape having a base material of cloth, paper, metal, or the like, and is one surface of the first insulating sheet 11 on the lower side of the seating sensor 7 (the surface facing the spacer 30). Affixed to the opposite side). The reinforcing tape 50 may be the same size as the first insulating sheet 11 or a different size.

  FIG. 4 is a diagram showing an equivalent circuit of the seating sensor 7. As shown in FIG. 4, the set STA of the pressure sensitive switch SW1 and the pressure sensitive switch SW2 and the set STB of the pressure sensitive switch SW3 and the pressure sensitive switch SW4 are connected in parallel. Moreover, these sets STA and STB are connected in series, and are arrange | positioned between a pair of terminals 13A and 13B.

  FIG. 5 is a diagram illustrating a state in which the seat device 1 is viewed from above and a cross-sectional state of the seat device 1. Specifically, FIG. 5A is a view showing the seat device 1 as viewed from above, and FIG. 5B is a cross-sectional view taken along the line WW in FIG. It is a figure which shows a mode.

  As shown to (A) of FIG. 5, the cushion pad 8 is provided with the backrest part 8A and the seat part 8B as main components. The backrest 8A and the seat 8B are elastic members that deform so as to be crushed when pressure is applied, and are formed of, for example, urethane foam.

  As shown in FIGS. 5A and 5B, a groove-shaped first concave portion (hereinafter referred to as a shallow concave portion) 61 is formed on the lower surface of the seat portion 8B along the width direction of the cushion pad 8, for example. It is formed as a step. In addition, a groove-shaped second concave portion (hereinafter referred to as a “deep shallow concave portion”) 62 that is narrower than the width of the shallow concave portion 61 along the longitudinal direction of the shallow concave portion 61 is formed in a second stage at a part of the bottom of the shallow concave portion 61. Formed as.

  As shown in FIG. 5B, a base material (hereinafter, referred to as a fixing base material) 65 which is a fixing portion of the external member is provided at the bottom of the shallow concave portion 61 by insert molding. The fixing base 65 is a metal plate, for example, and has a through hole PH corresponding to the opening of the deep recess 62. The peripheral area AR (FIG. 3A) of the second insulating sheet 21 in the seating sensor 7 is bonded to one surface of the fixing base 65 opposite to the bottom surface of the shallow recess 61 through the adhesive AD. Then, the seating sensor 7 is fixed to the cushion pad 8. The through hole PH of the fixing base 65 is disposed on the opening of the deep recess 62, and the cushion member 40 of the seating sensor 7 is inserted into the through hole PH.

  The depth DP1 from the opening in the shallow recess 61 to the surface of the fixing substrate is set to be larger than the thickness TH1 of the sheet structure SSB and the reinforcing tape 50, and the sheet structure SSB and the reinforcement are formed in the space SP1 of the shallow recess 61. The tape 50 is accommodated. On the other hand, the depth DP2 of the deep recess 62 is greater than the thickness TH2 of the cushion member 40, and the space SP2 of the deep recess 62 has a gap between the bottom surface of the deep recess 62 and the top surface of the cushion member 40 facing the bottom surface. The cushion member 40 is accommodated with GP.

  In addition, although the side surface of the shallow recessed part 61 shown by FIG. 5 (B) and the side surface of the sheet | seat structure SSB and the reinforcement tape 50 are in contact state, you may be in the state with a gap | interval. Moreover, although the side surface of the deep recessed part 62 and the side surface of the cushion member 40 have a gap, they may be in a contact state. However, it is preferable that the seat structure SSB and the side surface of the reinforcing tape 50 are in contact with each other in terms of preventing the displacement of the seating sensor 7 and strengthening the fixing state of the seat portion 8B and the seating sensor 7. .

  As shown in FIG. 5A, the shallow recess 61 and the deep recess 62 in this embodiment are formed in front of the hip point HP of the person who normally sits on the cushion pad 8. For this reason, each pressure-sensitive switch SW1 to SW4 of the seating sensor 7 accommodated in the space SP1 of the shallow recess 61 is disposed in front of the hip point HP of the person who normally sits on the cushion pad 8.

  “Regular seating” means sitting with the back in contact with the backrest and the buttocks located deep in the seat, and “hip point” means the hips of a person who is seated It means the part that is at the bottom.

  FIG. 6 is a conceptual diagram showing, in three stages, the distribution of the load applied to the placement member PT on which the seat 8B of the cushion pad 8 is placed by a person who is normally seated on the cushion pad 8. Specifically, in FIG. 6, a region that receives the highest pressing force from the cushion pad 8 is indicated by a right oblique line, a region that receives a pressing force smaller than the right oblique region is indicated by a left oblique line, A region that receives a small pressing force is indicated by a dot. In addition, the range width in each stage is comparable. Further, the right diagonal line is a line along the line connecting the upper right side of the paper and the lower left side of the paper surface, and the left diagonal line is a line along the line connecting the upper left side of the paper surface and the lower right side of the paper surface.

  The load applied by the person who normally sits on the cushion pad 8 is concentrated on the hip point on the seating surface of the seat portion 8B, but on the pedestal on which the cushion pad 8 is placed, as shown in FIG. The front is larger than the point HP.

  This is because the gravity of the thigh extending forward from the buttocks of the person who normally sits works in the vertical direction, and the gravity of the buttocks works in the forward direction in addition to the vertical direction. It is considered that the force that the gravity of the thigh and buttocks works in the forward direction is the force by which the backrest pushes the back. That is, when a person normally sits on the cushion pad 8, the back part 8A (FIG. 5A) pushes the back in contact with the back part 8A, and the force applied to the back pushes the person forward. thinking.

  Therefore, when the seat apparatus 1 is placed on a predetermined placement member in a vehicle or the like, as shown in FIG. 5A, the pressure sensitive switches SW1 to SW4 arranged in front of the hip point HP are As compared with the case where it is arranged in the vertical direction of the hip point HP, it receives a large pressing force. Thus, the sensitivity of the pressure sensitive switches SW1 to SW4 can be improved.

  The pressure sensitive switches SW <b> 1 to SW <b> 4 are disposed on the lower surface side of the seat portion 8 </ b> B in the cushion pad 8. Therefore, compared with the case where it arrange | positions to the seat surface side of the seat part 8B, the discomfort of the seating resulting from arrangement | positioning of the seating sensor 7 can be reduced.

  The pressure sensitive switches SW1 and SW2 are arranged on the right side and the pressure sensitive switches SW3 and SW4 are arranged on the left side with respect to the vertical plane VF passing through the center of the cushion pad 8 in the width direction. While the buttock of a person sitting on the cushion pad 8 is generally located on the left and right with respect to the vertical plane VF, the luggage is not necessarily located on the left and right with respect to the vertical plane VF. Therefore, it is more erroneous than when both the pressure sensitive switches SW1 and SW2 and the pressure sensitive switches SW3 and SW4 are arranged on the left side or the right side, or when the pressure sensitive switches SW1 to SW4 are arranged in a vertical plane VF. Detection can be suppressed.

  It is preferable that the pressure sensitive switch SW1 arranged on the left side of the vertical plane VF and the pressure sensitive switch SW4 arranged on the right side of the vertical plane VF are arranged symmetrically with respect to the vertical plane VF. The same applies to the pressure-sensitive switch SW2 disposed on the left side of the vertical plane VF and the pressure-sensitive switch SW3 disposed on the right side of the vertical plane VF.

  The pressure sensitive switches SW <b> 1 to SW <b> 4 are arranged on the same line in the width direction of the cushion pad 8. The pelvis of a person sitting on the cushion pad 8 is generally spread in the width direction of the cushion pad 8. Therefore, the sensitivity of the pressure sensitive switches SW1 to SW4 can be improved as compared with the case where the pressure sensitive switches SW1 to SW4 are arranged on the same line in the front-rear direction.

  FIG. 7 is a diagram illustrating a state in which the pressure-sensitive switch SW1 is turned on from the same viewpoint as FIG. As shown in FIG. 7, when a person sits on the cushion pad 8 of the seat device 1 placed on the placement member PT, the cushion pad 8 is pushed from both the seat surface side and the lower surface side of the seat portion 8B. Pressure is applied (see arrow).

  In this embodiment, since the space between the seating sensor 7 accommodated in the spaces SP1 and SP2 of the recesses 61 and 62 of the seat 8B and the placement surface of the placement member PT is a space, the seating sensor 7 is mainly used. Receives pressing force from the seat side. In the cushion pad 8 that has received such a pressing force, the cushion pad portion above the cushion member 40 is deformed so as to be bent and comes into contact with the upper surface of the cushion member 40 to press the cushion member 40. Due to this pressing force, the cushion member 40 is deformed to be crushed, and the second insulating sheet 21 is also pressed by this deformation.

  Since the second insulating sheet 21 is flexible, the second insulating sheet 21 enters the opening 31 </ b> A of the spacer 30 interposed between the second insulating sheet 21 and the first insulating sheet 11 in response to the pressing of the cushion pad 8. Bend. By bending in this way, the first electrode 12A and the second electrode 22A facing each other through the opening 31A are electrically connected and become conductive. Thus, the pressure sensitive switch SW1 is turned on.

  Note that a slit 32A (FIG. 2) that connects the opening to the outside is formed in the opening 31A in the present embodiment. For this reason, when the 1st insulating sheet 11 and the 2nd insulating sheet 21 bend, the air of 31 A of opening is discharged | emitted through the slit 32A, without staying in an opening. That is, it is avoided that the bending of the first insulating sheet 11 and the second insulating sheet 21 is suppressed by the air in the opening 31. Therefore, compared with the case where the slit 32A is not formed, the first electrode 12A and the second electrode 22A are easily in contact with each other, and the sensitivity of the pressure sensitive switch SW1 itself can be improved.

  By the way, when the thickness which the cushion member 40 is crushed is in the relation to be more than half of the distance between the first electrode 12A and the second electrode 22A, the cushion member 40 is deformed to be crushed without bending. The pressure sensitive switch SW1 can be turned on. Therefore, when such a relationship is adopted, the sensitivity of the pressure sensitive switch SW1 itself can be further improved.

  The first insulating sheet 11 has flexibility, but at least the second insulating sheet 21 such as a first insulating sheet that does not have flexibility (does not deform even when a load is applied). The 1st insulating sheet made harder than this can be adopted. When such a 1st insulating sheet is employ | adopted, when the 2nd insulating sheet 21 bends, the position of 1st electrode 12A arrange | positioned at the 1st insulating sheet is hold | maintained, without a 1st insulating sheet bending. The For this reason, compared with the case where the flexible 1st insulating sheet 11 is employ | adopted, even if the pressing force from a seat surface side is small, 22 A of 2nd electrodes become easy to contact 12 A of 1st electrodes. Therefore, when the first insulating sheet that is harder than at least the second insulating sheet 21 is employed, the sensitivity of the pressure sensitive switch SW1 itself can be further improved. However, the degree of hardness may be at least harder than the second insulating sheet 21. In addition, in the method of making the first insulating sheet 11 harder than at least the second insulating sheet 21, for example, a method of producing the first insulating sheet 11 with a material harder than the material of the second insulating sheet 21, or There is a method for producing the first insulating sheet 11 with a thickness larger than the thickness of the second insulating sheet 21. As a material of the 1st insulating sheet 11 in the case of making it harder than the 2nd insulating sheet 21, a metal etc. can be mentioned besides resin, such as PET mentioned above, PBT, or PEN.

  The matters described with reference to FIG. 7 regarding the pressure sensitive switch SW1 are the same for the other pressure sensitive switches SW2 to SW4.

  Next, a method for manufacturing the seat device 1 will be described. FIG. 8 is a flowchart showing a method for manufacturing the seat device 1. As shown in FIG. 8, the manufacturing method of the seat apparatus 1 includes a base material arranging step P1, a release agent applying step P2, a forming step P3, and a sensor fixing step P4 as main steps.

  Each of these steps will be described with reference to FIG. 9 or FIG. FIG. 9 is a diagram showing a state after the substrate placement step and the release agent application step. Specifically, FIG. 9A shows a state after the base material arranging step, and FIG. 9B shows a state after the release agent coating step. FIG. 10 is a diagram illustrating a state after the molding process.

<Base material arrangement process P1>
This base material arrangement | positioning process P1 is a predetermined position of the internal peripheral surface of 1st metal mold | die MPT, for example, as shown to (A) of FIG. 9 among the 1st metal mold | die and 2nd metal mold | die in a mold open state. In this step, the fixing base 65 is disposed. This position is a position that becomes the bottom of the shallow recess 61 (FIG. 5B) in the cushion pad 8.

<Releasing agent application process P2>
As shown in FIG. 9B, the release agent coating process P2 includes an inner peripheral surface of the first mold MPT other than the portion where the base material is disposed, and a second mold (not shown). This is a step of applying a release agent PP to the inner surface. This release agent PP is for smoothly taking out a molded product from a mold, and examples thereof include oils and fats such as fluid paraffin or vegetable wax.

<Molding process P3>
The molding process P3 is a process of molding the cushion pad 8. Specifically, first, the first mold and the second mold are clamped. By the first mold and the second mold in the clamped state, a space (not shown) imitating a molded product (hereinafter referred to as a molding space) is formed.

  Next, the foamed resin is injected from an injection port formed in the mold, and the foamed resin is filled into the molding space. This foamed resin is also called a polymer foam, and examples of the raw material include polyurethane (PUR), polystyrene (PS), polyethylene (PE), and polypropylene (PP).

  Next, the foamed resin filled in the molding space is cooled, and then the cushion pad 8 molded in the molding space is removed by opening the first mold and the second mold. In this way, as shown in FIG. 10, the shallow concave portion 61 and the deep concave portion 62 are formed in the lower portion of the seat portion 8B, and the bottom surface of the shallow concave portion 61 and one surface of the fixing base 65 are fixed. The pad 8 is molded.

  A part of the surface of the lower surface of the cushion pad 8 formed in this way becomes the surface of the fixing base 65, and is a portion to which the release agent PP is not applied.

<Sensor fixing process P4>
This sensor fixing step P4 is a step of adhering the seating sensor 7 to the cushion pad 8 formed in the forming step P3. Specifically, first, as shown in FIG. 3, an adhesive is applied to the peripheral area AR of the second insulating sheet 21 in the seating sensor 7.

  Next, the peripheral area AR is bonded to the fixing base 65 with an adhesive. In this way, as shown in FIG. 5B, the seating sensor 7 is fixed to the cushion pad 8, and the seat device 1 is obtained.

  As described above, in the seat device 1 of the present embodiment, as shown in FIG. 5B, the fixing base 65 is insert-molded on a part of the lower surface of the cushion pad 8, and the fixing base The seating sensor 7 is attached to the material 65 with an adhesive.

  For this reason, it is possible to suppress the pressure-sensitive switch SW1 of the seating sensor 7 from being turned on even when the seating sensor 7 is not seated, as compared with the case where the seating sensor 7 is integrally formed inside the cushion pad 8. Further, since the fixing base material 65 is insert-molded on the cushion pad 8 and an adhesive is adhered to the fixing base material 65, it is more adhesive than the case of directly adhering to the surface of the cushion pad 8. The agent AD can be made difficult to peel off. Further, it is possible to avoid the possibility that the cushioning property of the cushion pad 8 is changed by the adhesive AD. Thus, without impairing the cushioning property of the cushion pad 8, it is possible to suppress the pressure-sensitive switch SW1 of the seating sensor 7 from being turned on even when not sitting, and the reliability of the seat device can be improved. .

  Moreover, in the seat apparatus 1 of this embodiment, the space of the deep recessed part 62 is located above the seat surface side of the cushion pad 8 in the pressure sensitive switch SW1. For this reason, there is a gap GP between the bottom of the deep recess 62 and the seating sensor 7.

  Therefore, compared to the case where there is no gap GP, it is possible to reduce the fact that the pressure sensitive switch SW1 is turned on by a load applied to the cushion pad when a load lighter than a person is placed. Further, the sensitivity of the pressure sensitive switch SW1 can be adjusted depending on the size of the gap GP. As described above, the erroneous detection can be structurally reduced without depending on the fact that the erroneous detection is electrically determined.

  Furthermore, in the seat device of the present embodiment, the fixing base 65 is insert-molded on the bottom of the shallow recess 61 that is a portion where the deep recess 62 is not formed, and the seating sensor 7 is attached to the fixing base 65. It is pasted.

  Therefore, the fixing base 65 functions as a stopper that prevents the seating sensor 7 from moving above the cushion pad 8. Accordingly, it is possible to prevent the seating sensor 7 and the cushion pad 8 from coming into contact with each other due to the vertical movement of the cushion pad 8 and the pressure sensitive switch SW1 being turned on. Even if the opening of the shallow recess 61 is not closed, the seating sensor 7 can be held at a fixed position in the space SP1 of the shallow recess 61.

  By the way, when the cushion pad 8 of this embodiment is mounted on the mounting surface of the mounting member, when a load is applied to the cushion pad 8, a pressing force is applied from both the seat surface side and the lower surface side of the cushion pad 8. receive. In this respect, the seating sensor 7 of the present embodiment is housed in the spaces SP1 and SP2 of the shallow recess 61 and the deep recess 62, there is no member that contacts the lower side of the seating sensor 7, and the space directly below the seating sensor 7 is a space. Therefore, the cushion pad 8 is not in contact with the placement member on which the cushion pad 8 is placed.

  Therefore, the pressure-sensitive switch SW1 of the seating sensor 7 is turned on by the pressing force from the seating surface side without being substantially affected by the pressing force on the lower surface side. In general, the shape of the cushion pad 8 on the seat surface side and the lower surface side is different, and due to this difference, the pressing force received from the seat surface side and the pressing force received from the lower surface side tend to be non-uniform. is there. In this respect, since the pressure sensitive switch SW1 of the present embodiment is turned on by the pressing force from the seating surface side, the pressing force received from the seating surface side and the pressing force received from the lower surface side were not uniform. However, it is almost unaffected. Therefore, the sensitivity of the pressure sensitive switch SW1 can be easily adjusted.

  Further, since the hardness of the cushion pad 8 varies depending on the type of vehicle, etc., the degree of elastic deformation of the cushion pad 8 varies depending on the type of the cushion pad 8 due to the seating of a person. In the case of this embodiment, a cushion member 40 that covers the opening 31 </ b> A via the second insulating sheet 21 is provided on the surface of the second insulating sheet 21 opposite to the surface facing the spacer 30. There is a gap GP between 40 and the bottom of the deep recess 62.

  For this reason, the cushion member 40 can be deformed in the same manner regardless of the hardness of the cushion pad, and the second insulating sheet 21 can enter the opening 31 </ b> A of the spacer 30. Therefore, even if there is a gap GP between the cushion member 40 and the cushion pad 8, the insulating sheet can be appropriately bent. Further, the sensitivity of the pressure sensitive switch SW1 can be adjusted by the thickness of the cushion member 40.

  The cushion member 40 may be omitted. When the cushion member 40 is omitted, it is preferable to make the depth DP2 of the deep recess 62 smaller than that in the first embodiment from the viewpoint of improving the sensitivity of the pressure sensitive switch SW1. Further, the gap GP may be omitted.

(Second Embodiment)
The second embodiment will be described in detail with reference to FIG. Note that, unless otherwise specified, the same or equivalent components as those in the first embodiment are denoted by the same reference numerals, and redundant descriptions are omitted. FIG. 11 is a diagram illustrating the seat device 2 according to the second embodiment from the same viewpoint as in FIG.

  As shown in FIG. 11, the seat device 2 of the present embodiment includes a one-step recess 64 as a constituent element instead of the two-step recesses 61 and 62 (FIG. 5B), and space adjustment. It differs from the seat apparatus 1 of 1st Embodiment by the point which newly provides the spacer 70 for a component as a component.

  The formation position and shape of the concave portion 64 are the same as the shallow concave portion 61 in the first embodiment, and the depth DP4 of the concave portion 64 is the same as the depth DP1 of the shallow concave portion 61 (FIG. 5B) in the first embodiment. The depth DP2 of the deep recessed portion 62 ((B) in FIG. 5) is the total depth. That is, this corresponds to a state in which the space SP1 of the shallow recess 61 in the first embodiment is enlarged to the bottom surface position of the deep recess 62. The fixing base 65 is fixed to the bottom surface of the recess 64.

  The space adjusting spacer 70 has a substantially rectangular parallelepiped shape and is hard and does not deform due to the pressing force from the cushion pad 8. The thickness of the space adjusting spacer 70 is larger than the thickness TH2 of the cushion member 40 (FIG. 5B), and the space adjusting spacer 70 has a through hole HL for accommodating the cushion member 40. It is formed.

  One wide surface of the space adjusting spacer 70 is bonded to the fixing base 65 by the adhesive AD1, and the other surface is a peripheral region of the second insulating sheet 21 in the seating sensor 7 by the adhesive AD2 (in FIG. 3). (A)). Thus, the space adjusting spacer 70 changes the space SP4 of the concave portion 64 into the space SP1 (FIG. 5B) of the shallow concave portion 61 and the space SP2 of the deep concave portion 62 (FIG. 5B) in the first embodiment. It is formed as a corresponding space.

  Such a manufacturing method of the seat apparatus 2 is that a mold different from the mold used in the manufacturing method of the seat apparatus 1 in the first embodiment is used, and the procedure in the sensor fixing process P4 is changed. This is different from the method for manufacturing the seat device 1 in the first embodiment.

  Specifically, in the method for manufacturing the seat device 1 according to the first embodiment, a mold for molding the cushion pad 8 having the shallow recess 61 and the deep recess 62 is used. On the other hand, in the manufacturing method of the seat apparatus 2 of this embodiment, the metal mold | die for shape | molding the cushion pad 8 which has the recessed part 64 is used.

  Further, in the sensor fixing step P4 in the first embodiment, an adhesive is applied to the peripheral area AR of the second insulating sheet 21 in the seating sensor 7, and the peripheral area AR is adhered to the fixing base 65 with the adhesive. . On the other hand, in this embodiment, after the space adjusting spacer 70 is attached to the fixing base material 65 with an adhesive, the surface of the space adjusting spacer 70 opposite to the surface on the fixing base material 65 side is opposite. The seating sensor 7 is affixed to at least a part of the surface with an adhesive.

  If it does in this way, it can manufacture the seat apparatus 2 of this embodiment similarly to the manufacturing method of the seat apparatus 1 in 1st Embodiment.

  As described above, in the seat device 3 of the present embodiment, the space adjustment spacer 70 has the through hole HL positioned above the opening 31A via the second insulating sheet 21, and the space SP4 of the recess 64 is Two insulating sheets 21 are arranged.

  Therefore, a space corresponding to the thickness of the space adjusting spacer 70 (a space corresponding to the space SP2 of the deep recess 62 ((B) in FIG. 5)) is formed above the opening 31A. Therefore, compared with the case where there is no space, it is possible to reduce erroneous detection such that the pressure sensitive switch SW1 is turned on by the pressing force applied to the cushion pad when a load lighter than a person is placed. Further, the pressure adjustment switch SW1 can be adjusted to be turned on when a person is seated depending on the thickness of the space adjusting spacer 70. As described above, the erroneous detection can be structurally reduced without depending on the fact that the erroneous detection is electrically determined.

  In the seat device 3 of the present embodiment, since the space adjusting spacer 70 is interposed between the second insulating sheet 21 and the bottom of the recess 64, the space adjusting spacer 70 is positioned above the cushion pad 8. It functions as a stopper that prevents 7 from moving. Therefore, similarly to the first embodiment, it is possible to avoid erroneous detection of the pressure sensitive switch SW1 due to vibration of the cushion pad 8 or the like.

  Further, in the seat device 3 of the present embodiment, the cushion member 40 that covers the opening 31 </ b> A via the second insulating sheet 21 is provided on the surface of the second insulating sheet 21 opposite to the surface facing the spacer 30. For this reason, as in the case of the first embodiment, the cushion member 40 can be deformed in the same manner regardless of the hardness of the cushion pad 8, and the second insulating sheet 21 can enter the opening 31 </ b> A of the spacer 30. it can.

  The cushion member 40 may be omitted. When the cushion member 40 is omitted, it is preferable to make the thickness of the space adjustment spacer 70 smaller than that in the third embodiment from the viewpoint of improving the sensitivity of the pressure sensitive switch SW1.

(Third embodiment)
A third embodiment will be described in detail with reference to FIG. Note that, unless otherwise specified, the same or equivalent components as those in the first embodiment are denoted by the same reference numerals, and redundant descriptions are omitted. FIG. 12 is a diagram illustrating the seat device 3 according to the third embodiment from the same viewpoint as in FIG.

  As shown in FIG. 12, the seat device 3 of the present embodiment is the first in that the shallow recess 61 is omitted and the arrangement of the fixing base 65 is different from that of the first embodiment. Different from the seat device 1 of the embodiment.

  Specifically, in the first embodiment, the fixing base 65 is disposed on the bottom of the shallow recess 61. In contrast, in the present embodiment, since the shallow recess 61 is omitted, a deep recess 62 is formed in a part of the lower surface of the cushion pad 8, and a part of the lower surface of the cushion pad 8 other than the deep recess 62 is formed. A fixing base 65 is disposed. Only in this embodiment, the deep recess 62 is hereinafter referred to as a recess 62.

  Such a manufacturing method of the seat apparatus 3 uses the mold different from the mold used in the manufacturing method of the seat apparatus 1 in the first embodiment, and thus, in the same manner as the manufacturing method of the seat apparatus 1, The seat device 3 of the embodiment can be manufactured.

  As described above, in the seat device 3 of the present embodiment, the fixing base material 65 is insert-molded on a part of the lower surface of the cushion pad 8 other than the bottom of the recess 62, and the seating is performed on the fixing base material 65. The sensor 7 is attached with an adhesive. The pressure-sensitive switch SW1 of the seating sensor 7 is in a state in which the recess 62 is located above the seating surface side of the cushion pad 8.

  For this reason, the space of the recess 62 is positioned as the gap GP above the pressure sensitive switch SW1. Therefore, similarly to the first embodiment described above, it is possible to structurally reduce erroneous detection without depending on electrically determining erroneous detection.

  In the seat device 3 of the present embodiment, the lower surface of the cushion pad 8 other than the bottom of the recess 62 functions as a stopper that prevents the seating sensor 7 from moving above the cushion pad 8. Therefore, similarly to the first embodiment, it is possible to avoid erroneous detection of the pressure sensitive switch SW1 due to vibration of the cushion pad 8 or the like.

  Further, in the seat device 3 of the present embodiment, the cushion member 40 that covers the opening 31 </ b> A via the second insulating sheet 21 is provided on the surface of the second insulating sheet 21 opposite to the surface facing the spacer 30. For this reason, as in the case of the first embodiment, the cushion member 40 can be deformed in the same manner regardless of the hardness of the cushion pad 8, and the second insulating sheet 21 can enter the opening 31 </ b> A of the spacer 30. it can.

  In addition, this cushion member 40 may be abbreviate | omitted and the cushion member 40 and the recessed part 62 may be abbreviate | omitted. Even if it does in this way, compared with the case where the seating sensor 7 exists integrally in the cushion pad 8, the false detection (malfunction) of the seating sensor 7 can be reduced.

(Fourth embodiment)
The fourth embodiment will be described in detail with reference to FIG. Note that, unless otherwise specified, the same or equivalent components as those in the first embodiment are denoted by the same reference numerals, and redundant descriptions are omitted. FIG. 13 is a diagram illustrating the seat device 4 according to the fourth embodiment from the same viewpoint as in FIG.

  As shown in FIG. 13, the seat device 4 of the present embodiment is different from the seat device 1 of the first embodiment in that the second insulating sheet 101 having a structure different from that of the second insulating sheet 21 is provided as a constituent element.

  Specifically, in the first embodiment, the second insulating sheet 21 has the same size as the main block B1 (FIG. 2) of the first insulating sheet 11, and the peripheral area AR (FIG. 3) on one surface of the second insulating sheet. (A)) and the bottom surface of the shallow concave portion 61 were attached with an adhesive AD ((B) of FIG. 5).

  On the other hand, in the present embodiment, the second insulating sheet 101 is smaller than the main block B1 (FIG. 2) of the first insulating sheet 11 and has the same size as the outer shape of the cushion member 40. That is, the 2nd insulating sheet 101 is corresponded to the site | part from which the peripheral area | region AR ((A) of FIG. 3) in the 2nd insulating sheet 21 of 1st Embodiment was abbreviate | omitted. Therefore, as shown in FIG. 12, the peripheral area of one surface of the spacer 30 facing the second insulating sheet 101 is exposed from the second insulating sheet 101, and the exposed portion and the fixing base material 65 are separated from each other. Affixed with adhesive AD.

  The manufacturing method of such a seat apparatus 3 can manufacture the seat apparatus 3 of this embodiment similarly to the manufacturing method of the seat apparatus 1 in 1st Embodiment.

  As described above, in the seat device 4 of the present embodiment, the peripheral region of the spacer 30 is exposed from the second insulating sheet 101, the exposed region, and the fixing base material 65 fixed to the bottom surface of the shallow recess 61. Is glued.

  For this reason, even if the bonding between the second insulating sheet 101 and the spacer 30 is omitted, the second insulating sheet 101 and the spacer 30 can be arranged at fixed positions, so that the cost of the adhesive can be suppressed.

  In the present embodiment, the peripheral region of the spacer 30 is exposed from the second insulating sheet 101 by making the second insulating sheet 101 smaller than the first insulating sheet 11. However, for example, by providing one or a plurality of through holes in the peripheral area AR ((A) of FIG. 3) of the second insulating sheet 21 of the first embodiment, the area other than the peripheral edge of the spacer 30 is the second insulating sheet. 101 may be exposed. In short, it is sufficient that a part of the spacer 30 is exposed from the second insulating sheet.

  Thus, the form which exposes a part of spacer 30 from a 2nd insulating sheet, and adhere | attaches the exposed part and the cushion pad 8 is applicable to any of 1st Embodiment-3rd Embodiment.

  Although the present invention has been described above by taking the embodiment as an example, the present invention is not limited to this embodiment.

  For example, in the manufacturing method of the seat devices 1 to 4 in the above embodiment, the release agent application process P2 is performed after the base material arrangement process P1, but the base material arrangement process P1 is performed after the release agent application process P2. good. Thus, when performing the base material arrangement | positioning process P1 after the mold release agent application | coating process P2, compared with the case where the mold release agent application | coating process P2 is performed after the base material arrangement | positioning process P1, the mold release agent PP is apply | coated to the base material 65 for fixation. Since the operation of applying the release agent PP is eliminated so as not to be performed, the application operation can be simplified. However, when the base material placement step P1 is performed after the release agent application step P2, in the cushion pad 8 molded through the molding step P3, the fixing base material 65 exposed as a part of the surface on the lower surface of the cushion pad 8 is used. In this state, the release agent PP is applied to the surface. Therefore, when performing the base material arrangement | positioning process P1 after the mold release agent application | coating process P2, the mold release agent wiping process which wipes off the mold release agent apply | coated to a base material is required between the formation process P3 and the sensor fixing process P4. .

  In the above embodiment, the reinforcing tape 50 may be replaced with a reinforcing member other than the tape. Moreover, although the reinforcement tape 50 was affixed on the whole surface of the 1st insulating sheet 11, it may be affixed on one part area | region and may be abbreviate | omitted. However, when the lower side of the first insulating sheet 11 is a space, it is desirable that a reinforcing member is provided from the viewpoint of improving the durability of the seating sensor 7. Further, from the viewpoint of thickness reduction, the reinforcing member is preferably in the form of a sheet.

  In the said embodiment, the shape of the seating sensor 7, the 1st electrode sheet 10, the 2nd electrode sheet 20, and the spacer 30 is not limited to the said embodiment, Various shapes can be applied. Moreover, although the electrode of the 1st electrode sheet 10 and the 2nd electrode sheet 20 and the opening of the spacer 30 were made into circular shape, it can also be set as shapes other than the said circular shape.

  Moreover, in the said embodiment, although the number of pressure sensitive switches was four, three or less may be sufficient and five or more may be sufficient.

  In the above embodiment, the set STA of the pressure sensitive switch SW1 and the pressure sensitive switch SW2 and the set STB of the pressure sensitive switch SW3 and the pressure sensitive switch SW4 are connected in parallel, and the sets STA and STB are connected in series. Connected to. However, all of the pressure sensitive switches SW1 to SW4 may be connected in series or in parallel.

  Moreover, in the said embodiment, the shape and magnitude | size of 1st electrode 12A-12D and 2nd electrode 22A-22D corresponded, and it was supposed that it mutually overlapped completely. However, as long as the pressing force can be detected, the size, shape, and the like may differ between the first electrodes 12A to 12D and the second electrodes 22A to 22D, and may not completely overlap each other.

  Moreover, in the said embodiment, although the magnitude | size of opening 31A-31D of pressure sensitive switch SW1-SW4 was made the same, you may be made into the opening which has a 2 or more types of magnitude | size. In this case, the insulating sheet of the pressure sensitive switch having a large opening is more flexible than the insulating sheet of the pressure sensitive switch having a small opening, and the sensitivity of the pressure sensitive switch having the large opening is a pressure sensitive having a small opening. Improved compared to the switch. In general, the pressing force applied to the cushion pad 8 when a person is seated tends to decrease as the distance from the center of the cushion pad 8 in the width direction increases. Therefore, for example, the opening of the pressure sensitive switches SW1 and SW4 arranged farther from the center of the cushion pad 8 than the pressure sensitive switches SW2 and SW3 is compared with the opening of the pressure sensitive switches SW2 and SW3. If the state is large, variations in sensitivity of the pressure sensitive switches SW1 to SW4 can be suppressed.

  Moreover, in the said embodiment, the cushion member 40 which covers the opening 31A-31D in the spacer 30 collectively through the insulating sheet 21 or 101 was applied. However, a cushion member that individually covers each of the openings 31A to 31D may be applied. Moreover, although the cushion member 40 which covers the whole opening was applied, as shown, for example in FIG. 14, the cushion member 41 which covers a part of opening 31A-31D may be applied. Or although not shown in figure, the cushion member which covers a part of opening 31A and 31D and covers the whole other opening 31B and 31D may be applied. In short, any cushion member may be used as long as it covers at least part of the openings 31 </ b> A to 31 </ b> D via the insulating sheet 21 or 101. In addition, as described above, when an opening having two or more types of sizes is applied, the ratio of the cushion member covering the opening (the closing amount of the cushion member with respect to the opening) is different for each different type of opening. The sensitivity of the pressure sensitive switches SW1 to SW4 can be adjusted. For example, either one of the pressure-sensitive switch having the larger opening and the pressure-sensitive switch having the smaller opening is covered with a cushion member, and a part of the other opening is covered with the cushion member. In this way, even if there is a difference in the pressing force applied from the cushion pad 8 to the pressure sensitive switches SW1 to SW4, the uniformity (balance) at which these pressure sensitive switches SW1 to SW4 are turned on can be improved.

  Moreover, in the said embodiment, although the seating sensor 7 was fixed with the adhesive agent, you may fix by another method. For example, the seating sensor 7 may be fixed by a plurality of pins or the like that penetrate the periphery of each pressure-sensitive switch and are pierced by the cushion pad 8.

  Moreover, in the said embodiment, the sheet-like fixing base material 65 which has at least 1 through-hole PH was applied. However, the structure of the fixing base 65 is not limited to the above embodiment. For example, a pair of fixing base materials that are rod-shaped can be applied. When these fixing base materials are applied, insert molding is performed on the lower surface of the cushion pad 8 in a state in which the respective fixing base materials are parallel to each other, and the peripheral area AR of the second insulating sheet 21 ( A part of FIG. 3) is fixed by, for example, an adhesive. By fixing in this way, a gap GP corresponding to the space of the through hole PH can be obtained between the bottom of the shallow recess 61 and the pressure sensitive switch SW1. As another example, two or more fixing base materials having a frustum shape can be applied. When applying these fixing base materials, insert molding is performed on the lower surface side of each fixing base material or a part of the plane side facing the fixing base material on the lower surface of the cushion pad 8, and the fixing base material protrudes from the lower surface of the cushion pad 8. A part of the peripheral area AR (FIG. 3) of the second insulating sheet 21 is fixed to the base material by, for example, an adhesive. By fixing in this way, a gap GP corresponding to the space of the through hole PH can be obtained between the bottom of the shallow recess 61 and the pressure sensitive switch SW1.

  Moreover, in the said embodiment, the sheet-like space adjustment spacer 70 which has at least 1 through-hole HL was applied. However, the structure of the space adjusting spacer 70 is not limited to the above embodiment. For example, a pair of space adjusting spacers that are rod-shaped can be applied. When these space adjustment spacers are applied, each space adjustment spacer is fixed with the adhesive AD2 in the longitudinal direction of the peripheral area AR (FIG. 3) of the second insulating sheet 21, and the bottom of the shallow recess 61 with the adhesive AD1. Fix it. If fixed in this way, the gap GP can be obtained between the bottom of the shallow recess 61 and the pressure sensitive switch SW1 by the space adjusting spacer, as in the third embodiment. As another example, two or more space adjusting spacers having a frustum shape can be applied. When applying these space adjustment spacers, the bottom surface of each space adjustment spacer or the plane directly opposite thereto is fixed to the peripheral area AR (FIG. 3) of the second insulating sheet 21 with an adhesive AD2 at predetermined intervals. The flat surface or the bottom surface is fixed to the bottom of the shallow recess 61 with the adhesive AD1. If fixed in this way, the gap GP can be obtained between the bottom of the shallow recess 61 and the pressure sensitive switch SW1 by the space adjusting spacer, as in the third embodiment.

  The seat device according to the present invention includes a cushion pad having a base material provided by insert molding on at least a part of the lower surface of the cushion pad, and at least one feeling for detecting a load applied to the seat surface of the cushion pad. If the seat sensor has a pressure switch and is fixed directly or indirectly to the base material, the components of the seat device can be appropriately combined in addition to those described above.

  The present invention is applicable to a seat of a vehicle such as a vehicle, and is particularly applicable to a seat to which a seat belt is to be worn.

DESCRIPTION OF SYMBOLS 1-4 ... Seat apparatus 7 ... Seat sensor 8 ... Cushion pad 8A ... Backrest part 8B ... Seat part 10 ... 1st electrode sheet 11 ... 1st insulating sheet 12A- 12D ... 1st electrode 13A, 13B ... Terminal 14A-14D ... Wiring 20 ... 2nd electrode sheet 21, 101 ... 2nd insulation sheet 22A-22D ... 2nd electrode 24A- 24C ... second wiring 30 ... spacer 31A to 31D ... opening 32A to 32D ... slit 40, 41 ... cushion member 50 ... reinforcing tape 61 ... shallow recess 62 ... Deep recess 64 ... Recess 65 ... Fixing base material 70 ... Space adjustment spacer GP ... Gap HL, PH ... Through hole HP ... Hip point SP1-SP4 ... Space SSB ... Sheet Structure SW1 to SW4 ... Pressure sensitive switch

Claims (8)

A seat device comprising a cushion pad and a seating sensor,
The cushion pad is
Having a base material provided by insert molding for at least part of the lower surface of the cushion pad;
The seating sensor is
A seat device having at least one pressure-sensitive switch for detecting a load applied to a seating surface of the cushion pad, and being directly or indirectly fixed to the base material. A recess is formed at a position including above the pressure sensitive switch,
The seating sensor is disposed below the bottom of the recess,
A gap is formed between the bottom portion of the concave portion above the pressure sensitive switch and the seating sensor, and at least a part of the lower surface of the cushion pad other than the bottom portion of the concave portion above the pressure sensitive switch. The seat device according to claim 1, wherein the base material is provided. The pressure sensitive switch is
A first insulating sheet;
A second insulating sheet that has flexibility and is disposed closer to the seat surface side of the cushion pad than the first insulating sheet;
A sheet-like spacer interposed between the first insulating sheet and the second insulating sheet and having at least one opening formed therein;
3. The device according to claim 1, further comprising: a pair of electrodes disposed on the spacer side surface of the first insulating sheet and the second insulating sheet and facing each other through the opening. Seat equipment. At least a part of the surface of the spacer that faces the second insulating sheet is exposed from the second insulating sheet, and the exposed portion is attached to the base material with an adhesive, whereby the spacer is attached to the base material. The seat device according to claim 3, wherein the seat device is fixed directly or indirectly. The seating sensor is
A cushion member which is provided on a surface opposite to the spacer side in the second insulating sheet and covers at least a part of the opening via the second insulating sheet;
The seat device according to claim 3 or 4, wherein a gap is provided between the cushion member and the cushion pad. The seat device according to any one of claims 3 to 5, wherein a reinforcing member is provided on at least a part of a surface of the first insulating sheet opposite to a surface facing the spacer. . The seat device according to any one of claims 3 to 6, wherein the first insulating sheet is harder than the second insulating sheet. A base material placement step of placing a base material on the surface portion of the surface of the molding space in the mold that is the lower surface of the cushion pad;
A release agent application step of applying a release agent to the surface of the molding space in the mold other than the surface portion;
A molding step of injecting foamed resin into the molding space and molding the cushion pad;
A seating sensor having at least one pressure-sensitive switch for detecting a load applied to the seating surface of the cushion pad, directly or with respect to the base material exposed from the lower surface of the cushion pad after the molding step, A method of manufacturing a seating device, comprising: a sensor fixing step of indirectly fixing.

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